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HuttenlocherTechnologies
CriticalCVSS 9.8WordPress plugins & themes

CVE-2025-3605

Frontend Login and Registration Blocks: Privilege escalation

The Frontend Login and Registration Blocks plugin for WordPress is vulnerable to privilege escalation via account takeover in all versions up to, and including, 1.1.1. This is due to the plugin not properly validating a user's identity prior to updating their details like email via the flr_blocks_user_settings_handle_ajax_callback() function. This makes it possible for unauthenticated attackers to change arbitrary user's email addresses, including administrators, and leverage that to reset the user's password and gain access to their account.

Description from the National Vulnerability Database, published by Wordfence

What to do: Affects up to 1.1.1. Update Frontend Login and Registration Blocks to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.

What it means for a small business

Frontend Login and Registration Blocks is a WordPress plugin. If your website uses it, the flaw is on your site whether or not anyone has noticed yet: attackers scan the whole internet for the plugins with published flaws, usually within days of a record like this one going public.

Most small-business sites run 15 to 40 plugins, and few owners know the list. You can check from WordPress itself (Plugins, then Installed Plugins), or let our free plugin check look it up by name.

Check your own setup

Part of the Huttenlocher Technologies vulnerability database, refreshed twice a day from CISA and the NVD. The title, category and plain-language guidance are ours; check the linked record before acting on a detail. This is general guidance, not a review of your systems.

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